You probably didn't realize it, but cancer currently takes the lives of a quarter of all dogs and one out of every eight cats. In a video from Ontario Veterinary College, dogs sing "We Could Be Heroes" in a campaign to raise fund to fight canine cancer. If you donate to Pet Trust, Purina will match your donation. There's a widget at the site in which you can add pictures of your own pet to this video. -via Cute Overload